Hot run at the park

Am not sure how I did it, but I pulled a muscle in my lower back while getting dressed for church this morning.  I took 3 Ibuprofen tablets at the restaurant after church and then laid on a heating pad for a long time after getting home.  Then, I filled up the camel back with water and headed for the park.  According to my truck thermometer, the temperature was 99 degrees.  I ran 7.4 miles on the near-empty trails.  My back loosened up a bit, but I did get some pain in the old hip.  I took one fall and skinned up my left knee, which has taken a beating after years of trail running.  At least, I'm ready for a couple 10K's next month and hopefully a 10-miler.